Here is the shake map from the USGS where they compile "I felt it" reports submitted through the internet.

I wanted to find out how common or uncommon a 3.7 magnitude earthquake is in the KFVS viewing area (southeast Missouri, southern Illinois, western Kentucky, and northwest Tennessee). It turns out that since 1974 we have had 12 earthquakes of a 3.7 or greater magnitude.
Below is the map with the location/intensity of the quakes in the area since 1974.

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